Kc Calculations Calculations involving?Kc In the equilibrium expression each figure within a square bracket represents the concentration in?mol dm-3 The?units?of?Kc?therefore depend on the f...
The Equilibrium Constant, Kc Equilibrium expression & constant The?equilibrium expression?links the?equilibrium constant,?Kc, to the?concentrations of reactants and products?at equilibri...
Le Chatelier's Principle Position of the equilibrium The?position of the equilibrium?refers to the relative amounts of products and reactants in an equilibrium mixture When the position of e...
Maxwell-Boltzmann Distribution Curve - Catalyst Catalysis?is the process in which the rate of a chemical reaction is increased, by adding a?catalyst A catalyst increases the rate of a reacti...
Concentration, Pressure & Rate of Reaction Concentration The more?concentrated?a solution is, the?greater?the number of?particles?in a given volume of solvent An increase in?concentratio...
Temperature & Rate of Reaction Temperature & Rate of Reaction Increasing the temperature of the reaction mixture increases the?rate of reaction?in the following two ways: At higher t...
Maxwell-Boltzmann Distribution Curve - Temperature Maxwell-Boltzmann distribution curve A?Maxwell-Boltzmann distribution curve?is a graph that shows the distribution of?energies?at a certain...
Measuring the Rate of a Reaction Reaction rate The?rate of reaction?is the speed at which a chemical reaction takes place and has units?mol dm-3?s-1?or?mol dm-3?min-1 The rate of a reaction ...
Bond Enthalpies The amount of energy required to break one mole of a?specific?covalent bond in the gas phase is called the bond dissociation energy Bond dissociation energy (E) is usually ju...
Hess' Law Calculations You must make sure that you can apply Hess' Law effectively and calculate enthalpy changes in different situations Remember - it is the data that is important Check wh...
Using Hess' Law Calculating ΔHr?from ΔHf?using Hess’s Law energy cycles The products can be directly formed from the elements =?ΔH2 OR The products can be indirectly formed from the elements...
Calorimetry Measuring enthalpy changes Calorimetry?is the measurement enthalpy changes in chemical reactions A simple?calorimeter?can be made from a?polystyrene drinking cup, a?vacuum flask?...
